27238513 has 4 divisors (see below), whose sum is σ = 27685108. Its totient is φ = 26791920.

The previous prime is 27238501. The next prime is 27238517. The reversal of 27238513 is 31583272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11102224 + 16136289 = 3332^2 + 4017^2 .

It is a cyclic number.

It is not a de Polignac number, because 27238513 - 2¹⁷ = 27107441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27238517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223206 + ... + 223327.

It is an arithmetic number, because the mean of its divisors is an integer number (6921277).

Almost surely, 2^27238513 is an apocalyptic number.

It is an amenable number.

27238513 is a deficient number, since it is larger than the sum of its proper divisors (446595).

27238513 is an equidigital number, since it uses as much as digits as its factorization.

27238513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446594.

The product of its digits is 10080, while the sum is 31.

The square root of 27238513 is about 5219.0528834263. The cubic root of 27238513 is about 300.8807929632.

It can be divided in two parts, 2723 and 8513, that added together give a square (11236 = 106²).

The spelling of 27238513 in words is "twenty-seven million, two hundred thirty-eight thousand, five hundred thirteen".